Composition for coating metals.



UNITED STA3ES lfA' I ENT OFFICE.

MAXIMlLIAN Too-ii, on NEW YORK. N. Y.

COMPOSITION FOR COATING METALS}.

Specification of Letters Patent.

Patented Jan; 15, 1907.

Application filed February 7,1905. Serial No. 299,988.

. binder, preferably a salt of an organic acid, I 5' specifically calcium linoleate. The material is ground in any suitable vehicle, such as a solution of kauri resin in naphtha or turpentine, and suitable inert mineral dizluehts, pigments to give body and covering power, and coloring agents are added. lVhen a metallic structure is painted with this composition and exposed to the weather, the calciumlinoleate binder is oxidized or decomposed,

liberating calcium hydroxid, which acts as a perfect protection against corrosion.

In manufacturing the composition a pure tricalcium silicate is produced by fusing three arts of calcium carbonate with one part 0 aluminium silicate in a furnace heat-' ed to 1,700 Fadrenheit. The materials must be ground. as fine as possibleand must passa tWo-hundred-mesh sieve. After the reaction the fused mass is withdrawn and composition.

finely ground. The silicate product must be kept-outof contact with moisture before mixing it with the other ingredients of the example, with a solution of a small percentage of kauri resin in naphtha or turpentine,

and the resulting mixture constitutes a suitable vehicle in which the calcium silicate is ground.

The composition is now too alkaline and would decompose too rapidly if used without further additions. It is therefore mixed with an inert mineral diluent, such as finelydivided magnesia, silica, or alumina. The composition is also lacking in body and covering power. for the reason' that the calcic silicate and linoleate have nearly the same refractive index. A pigmentsuch as zinc sulfid or oxid, lead sulfid ofcarbonate, ba-.

rium sulfate, or a mixture of zinc sulfid and,

barium sulfate is therefore added. A desirable grayv color may be given to the paint by adding a small amount of l'ampblack.

I claim- 1. A composition for coating metal, consisting. essentially of calcium silicate and a binder. 1

2. A composition for coating metal, con- Weak organic acid salt.

3. A composition for coating metal, consisting essentially of calcium silicate and a weak calcium salt.

, 4f A composition for coating metal, consisting essentially; of calcium silicate and a calcium organic acid salt.

5. A composition for coating metal, comprising tricalcium silicate and calcium linoeate. K

6. A composition for coating metal, comprising tricalcium silicate, calcium linoleate and a mineral diluent.

-7. A composition for coating metal, comprising calcium silicate, calcium linoleate, a mineral diluent and a pigment.

8. A composition for coating metalf iconsisting essentially of a stable body material and calcium linoleate.

In testimony whereof I aflix in presence of two witnesses.

MAXIMILIAN TOCH.

my signature- Witnesses:

HARRY E. BAER, S. J. BINSWANGER.

. sisting essentially of calcium silicate and a' 

